The upper portion, showing an aerial blueprint.
Featured on PDR in the essay Illustrations of Madness: James Tilly Matthews and the Air Loom
Mike Jay recounts the tragic story of James Tilly Matthews, a former peace activist of the Napoleonic Wars who was confined to London's notorious Bedlam asylum in 1797 for believing that his mind was under the control of the “Air Loom” — a terrifying machine whose mesmeric rays and mysterious gases were brainwashing politicians and plunging Europe into revolution, terror, and war.